Burner



April 19, 1932. H. c. LORD BURNER Filed March 22, 192s fill - ure beenheretofore controlled b Patented Apr. 19, 1932 UNITED STATES PATENTOFFICE application med umh 22, 192s. serial ineens.

Burners which are arranged for delivering varying degrees of heat have,in a large meascompletel shutting down the burner at intervals so thatthe mean out-put of the burner was of the amount desired. The presentinvention is designed to improve such burners by providing a burner inwhich the capacity may be varied to suit the requirements with a con,tinnous operation of the burner and is in many respects an improvementover the aplication filed by me, Feb. th, 1926, Serial umber 88,481,means for forming explosive mixtures and carburetor therefor. Thepresent invention simply adapts the broader Ainvention of thatapplication to the ordinary motor-driven burner. Features and details ofthe invention will appearfrom the specip cation and claim.

The invention is illustrated in the accompanying drawings as follws Fig.1 shows a side elevation of a burner, partly in section.

Fig. 2 an end view of the burner, partly in section, on the line 2-2 inFig. 1

Fig.-3 a section on the line 3-3 in Fig. 1.

Fig. 4 a section on the line 4-4 in Fig. 3.

1 marks th'e burner nozzle, 2 an air passage leading to the nozzle, 3- afan delivering air for combustion, '4 a shaftion which the fan ismounted, 5 an electric motor driving the fan, and 6 an inlet passage tothe fan.

A constant level float chamber 7 is connected by a fuel passage 8 with anozzle tube 9.

- The passage 8 is controlled by a needle valve 10. The nozzle tube `9has discharge openings 11.v These nozzle openin s discharge intoawell 12andina be adjuste as to height by a screw 9a. The el passes from thewell 12 b a passage 13 to a well 14. A tube 15 -is a justably arrangedin the well 14 and is extended by means of a tube 16. The tube 16 isconnected by a coupling 17 with the end of a bridge 18 arranged on thepassage 2. The bridge has ,an opening 19 in continuation of the opening`of the tube 16 leading to an atomizing chamber 20 having a nozzle 21directed into the burner nozzle 1. An air nozzle 22 is directed oppositethe atomizing nozzle 21 in the usual manner of atomizers breaking up andatomizing the fuel and at the same time through the aspirating ef-` fectexhausting whatever fuel may be supplied to the well 14. It is connectedby a passage 23 extending throu h the bridge with a 55 pipe 24. The pipe24 eads from a rotaryl pump 25 having gear connections for the rotatingelements of the pump and is driven from the shaft 4. It receives its airthrough a pipe 27 leading from the intake assage 6.

The well 14 is connected wit the intake passageby an opening 28 and thewell 12 is connected with the passage by an opening 29.

r1 he openings 28 and 29 are suicient to maintain the wells underapproximately the u same pressure as the intake passa e 6 so that thesuction effort induced by the an is communicated to the nozzle well 12to induce a flow of fuel in proportion to the low of air induced by thesame suction effort, and the passa e 28 leading to the Well 14 preventsa distur ance as to the action of the Well 12 due to any suction effortover and above what is necessar to elevate the fuel through the pipe 16,it eing understood that the-aspirating effect of the atomizer issufficient to discharge the maximum amount of fuel that may be fed tothe well 14 through the suction effort on the nozzle 11. Ordinarily,therefore, there will be some'air drawn through 80 the pipe 16, but theopening 28 is'of such size that thev uantity drawn throu h the pipe 16ywill not isturb the pressure alance in the Well 14 sufficiently toeffect a pressure disturbance in the well 12. `This forms a measuringmeans for the fuel which assures a delivery of fuel proportioned to theflow of air.

The capacity of the burner may be controlled either by controlling thespeed of the pump, or by an ordinary throttle 30. If the throttle isclosed the delivery of air by the fan is reduced and consequently thesuction effort is reduced in the passage 6 and the fuel supply reducedin proportion to the sup ly of air. As the throttle is opened andp agreater supply of air isdelivered a greater suction is induced and inconsequence a proportionate amount of fuel is suplied. v It will benoted that any air drawn t rough the i e 24 by the umpv 25 is simplybypassed rm the inlet pgssage 6 and, therefore, adds to the extent oftheair withdrawn throu h the suction effort in that bypass so that e fueldelivered responds to the total air drawn through the suction passage byway of the fan, or the ump. v

"Wl1at I c aim as new is In a burner, the combination of a burnernozzle; a passage leading to the nozzle; an aspirating atomizerdischarging to the passa e; means comprising a fan in the passage,

said means inducing a varying flow of au through the passafge withvarying pressure in the passage; a uel connection eading to theatomizer; and fuel measuring means responding to the varying pressuresof the passage comprising a constant level fuel chamber containing fuelunder atmospheric ressure and having a fuel discharge there om openingat a point adjacent to such constant level subjected to the pressures ofthe passage for varying the fuel flow to correspond to the air flow andmeans also subjected to the passagey pressure delivering the fueldischarge by the measuring means to the fuel connection.

In testimony whereof I have hereunto set my hand.

- HUGH C. LORD'.

